Final answer:
The relationship between Cristo and Santiago cannot be determined based on the given information.
Step-by-step explanation:
The relationship between Cristo and Santiago cannot be determined based on the provided information. The reference to the Gospels describes a scene where Christ and Judas are reaching towards a plate together, but it does not provide any direct information about their relationship. In another reference, a painting of Don Juan JoachÃn Gutiérrez Altamirano Velasco, Count of Santiago de Calimaya, is mentioned, but this does not provide any information about Cristo's relationship with Santiago either.